中文摘要：

以N，N-二甲基甲酰胺（DMF）／H20为溶剂，FeSO4·7H2O，H3PO4和LiOH·H20为原料，L-抗坏血酸（L-AA）为还原剂，溶剂热合成LiFePO。颗粒，为得到形貌规则的纳米级橄榄石型LiFePO。晶体，本文通过调节溶剂中DMF与H：O的比例，反应物浓度以及添加蔗糖来控制LiFePO。颗粒的形貌和尺寸。采用扫描电镜（SEM）和X射线衍射（XRD）对产物的形貌和晶体结构进行表征。结果表明，当溶剂中体积比DMF：H2O=30：10且FeSO4·7H2O浓度为0．05mol／L（Fe：P：Li=1：1：3）时，可以得到规则的橄榄石型LiFeP04颗粒；此外，蔗糖的加入能够在一定程度上减小晶体的颗粒尺寸，并且当加入的蔗糖浓度为0．5mg／mL时，得到尺寸为800nm左右、分散性良好的正交晶系橄榄石型LiFeP04颗粒。

英文摘要：

Olivine-type LiFePO4 was synthesized via solvothermal method, using N, N-dimethylformamide （DMF）/H20 as solvent, FeSO4· 7H20, H3PO4, LiOH · H20 as raw materials and L-ascorbic acid （L- AA） as the reductant. Regular nanoscale olivine-type LiFePO4 particles were obtained by adjusting the ratios of DMF to H20, the concentration of reactants and addition of sucrose. The morphology and structures of the composites were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The results indicated that the regular nanoscale olivine-type LiFePO4 particle could be synthesized when the ratio of DMF to H20 was 30： 10, the concentration of FeSO4 · 7H20 was 0.05 mol/L （ Fe： P： Li = 1 ： 1 ： 3 ） and concentration of additional sucrose was 0.5 mg/mL.